what is the head oil control orifice and o-ring?
i mean, whats its function, does anyone has a picture of it on their block.
to change it, does it require cylinder head removal??
thanks for the info

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by yeungkaho &raquo;</TD></TR><TR><TD CLASS="quote">
to change it, does it require cylinder head removal??
</TD></TR></TABLE>

Yes. And amazingly, it controls (restricts) oil flow to the cylinder head from the main oil galley downstream of the filter.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by D &raquo;</TD></TR><TR><TD CLASS="quote">Yes. And amazingly, it controls (restricts) oil flow to the cylinder head from the main oil galley downstream of the filter.</TD></TR></TABLE>

D rocks

 

so if it is plugged what would happen, or if it doesnt restrict oil?
my ITR dun have vtec now, everything is working, except, i do no have oil pressure going to the vtec solenoid, i have a lil bit of oil, but very little. when i plug in my oil pressure guage, it doesnt even register anything, do you thk this oil orifice have anything to do with it?
i just rebuild my engine btw. the cylinder head was sent to machine shop to have the valves replaced, entire engine has been cleaned. and i assembled it myself, the cylinder head has been overhauld by machine shop.

 

you have pictures of the block with the head off?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by yeungkaho &raquo;</TD></TR><TR><TD CLASS="quote">i just rebuild my engine btw. the cylinder head was sent to machine shop to have the valves replaced, entire engine has been cleaned. </TD></TR></TABLE>

Define 'cleaned'. Hot tanked? Bead blasted? Short block reassembled? block decked?

 

i do not have pic of my block now.
block was disassembled and hot tanked.
machine shop reinstalled everything on the block except for the crank bearing piston.
cylinder head was hot tanked also, the head was resurfaced, all the lifters, springs was old.


Modified by yeungkaho at 2:24 AM 4/19/2007

 

some pic i found on the internet
so back to the main question,
Does the head oil control orifice affect vtec?
thats what i really want to know
also, anyone have or know where can i find service manual for ITR.
i use both mitchell and all data...but sometimes they lack some itr specific stuff.







Modified by yeungkaho at 2:58 AM 4/19/2007

 

Oil control orifice located between 2 &3, on intake side. In pictures 1 and 3, it is shown installed, on pic 2, it is removed.

Back to cleaning... were the block and head bead blasted? If so, did you check all oil passages and blow them all clean?

And yes... the oil control orrifice controls oil flow into the head. Do you see any other passages on the deck of the block that aren't headbolts, cooling passages, or oil drains?

 

just took out my cylinder head tonight, snap a few pic,

 

What are you showing us with those pics? Its there in you block...

Did you answer D's questions?

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by D &raquo;</TD></TR><TR><TD CLASS="quote">Oil control orifice located between 2 &3, on intake side. In pictures 1 and 3, it is shown installed, on pic 2, it is removed.

Back to cleaning... were the block and head bead blasted? If so, did you check all oil passages and blow them all clean?

And yes... the oil control orrifice controls oil flow into the head. Do you see any other passages on the deck of the block that aren't headbolts, cooling passages, or oil drains?</TD></TR></TABLE>

 

nothing was blasted.
i will take off the oil orifice and blow the oil passage tonight to see if it is clogged

 

in this pic, can someone tell me which is the oil passage

 

quick question, how to take off the oil control orifice, its not a allen key

 

You find a small bolt that will thread into the hole and once inserted, just pull straight up.

 

i found a easier way....took a blow gun....blow in the hole, have someone cover one of the oil passage hole on the left hand side, the air pressure pushes the oil orifice up by itself....looked at the oil orifice...nth special....o-ring intact.....on to diagnosing something else...
snapped a few pic, will upload later as i have a few question to ask...
can someone telll me which hole on the cylinder head(head gasketside) does the oil feed into the head....i know the oil orifice hole does, but what else?

 

btw: the blue colored means that its not oil feed...
can someone please identify the rest for me, thanks

 

After more diagnosis, the oil orifice seems normal.
On to diagnosing the vtec solenoid and its nearby passage.

In this image, for some reason the vtec rocker arm locks to the left rocker, and doesnt llock to the right rocker, all the cylinder is like this, is it normal?


Some more labeling, I dont understand the function if each hole in this picture. any help will greatly help me in diagnosing this problem


A pic of the actual solenoid, the round "pusher" moves freely

 

TTT

 

Help needed...

 

updat* check all that i can think of, couldn't find anything, now, i have one last thing to check but need you opinion, theres this rail on top of the cam that transfer oil on top of my cyl head, but the problem is that the oil hole on the rail is reallly really small.....i cant clean things out, any idea how you guys do it??

 

u got no o rings man u need to get those

i think i have same problem as u no vtec. i loose pressure when my solenoid opens up. i have LSVTEc so i have some oil pressure to the head. i got no O ring too. gettin one tomorrow. i will update. but u need to get those o rings. its dowel pin and rubber o-rings.

 

Have you "checked" your vtec solnoid? Also are you sure your getting adquate pressure to the head?

 

Did you ever get this issue resolved? My built gsr is doing same thing.

 

. . .